Bearing puller



Sept. 4, 1928. 683,189 J. w. HOWELL BEARING FULLER Filed April 23, 1927 2 Sheets-Sheet 1 INVENTOR JAJVES' MIAMI HEM BY W ATTORNE Sept. 4, 1928.

,1. w. HOWELL BEARING FULLER Filed April 25, 1927 2 Sheets-Sheet 2 lNVENTOR JAMES IMHOWEZZ.

ATTORN EYS l aten'led Sept. 4, 1928 UFNITEDMSTATES PATENT OFFICE.

JAMES w. OWELL, or CLEVELAND, OHIO, ASSIG-NOR TO THE VJHITE oron oom- PANY, or CLEVELAND, OHIO, A CORPQRATIQN or orrro.

BEARING PULL'ER.

Application filed April 23, 1927. Serial No. 185,932.

This invention relates to tools such as are used for removing bearings and like parts, which must be moved longitudinally along their supports and against considerable resistance.

It is particularly applicable to the removal of bearings which are so situated that access to the rear surface thereof is obstructed or in which the force necessary to remove the hearing must be applied to the inner race.

Heretofore much difficulty has been experienced in removing bearings of the types referred to, and it has frequently been necessary to dismantle or disassemble large portions of the apparatus on which these are employed for the sole purpose of removing the bearings.

By applications of my invention, hearings in many inaccessible places maybe removed, it being only necessary to have access to the front or outer face of the bearings.

The invention will be better understood from the description of one practical embodiment thereof illustrated in the accompanying drawings in which Fig. l is a side elevation of one form of apparatus embodying my invention,-parts being broken away, theiparts being in the position they occupy when extracting the inner race of a ball bearing.

Fig. 2 is an end elevation taken from the front or outer end thereof. i

Fig. 3 is a central longitudinal section thereof, partly broken away, showing the parts in the position they occupy while be ing brought into engagement with the inner race of a ball bearing. a

Fig. 4. is a transverse sectional view on the line 1V-IV of Fig. 8.

Fig. 5 is a fragmentary transverse sectional view on the line VV of Fig. 3, and

Figs. 6 and 7 are perspective views of the gripping arms illustrated in the preceding figures.

The tool comprises, in general, a screw or the like for exerting longitudinal pressure to remove an object from its support and a chuck for engaging and gripping the object to effect its removal. The term chuck is used hereinafter not only to indicate the particular chuck shown, but also to include any device having gripping elements or jaws which hold an object by being contracted'to exert'inward pressure upon an exterior suriace of the object. v

A screw is illustrated atv 1, having at its outer end a head 2 adapted to be engaged by a wrench. or the like, and journaled on its inner end an abutting washer 3 for contacting the end of a tubular support 4- from which a ball-bearing having an inner race 5 to be removed. Threaded upon the screw is a travelling nut consisting of an enlarged head 6 and cylindrical shank 7 which is caused to move. axially of the screw when the latter is rotated. Threaded to the inner end of the nut is a tubular extension or bushing 8 having at its inner extremity a peripheral flange 9. z

Rotatable and slidable upon this bushing is hub 10 of a wheel-like arm-retainer which comprises in addition to the hub, two spokes 11 and a peripheral rim or'ring 12. The inner surface of the-ring 12 is provided with a curved annular groove 13 for a pur pose to be hereinafter described.

Upon thecylindrical shank ofthe nut is slidably mounted a sleeve l lythe outer end of which is cylindrical and externall threaded,- and the inner end ofwhich is of substantially frustro-conical shape, increasing in diameter-toward the flange 6. A key-way 15 is cut in the inner'surface of this sleeve so that it will slide over a small screw 16 threaded into the shank of the nut to retain the sleeve from rotative movement relative the shank. i v

An internally threaded cap 17 engages the thread of the sleeve, the cap being provided with an inwardly directed peripheral flange engaging a shoulder 18 on the nut near its outer end and retained adjacent the shoulder by a ring 19 seated on a cylindrical protection 2().which forms the outer end of the nut. This cap is knurled so that it may be readily adjusted by hand without the use of tools and so locate the sleeve at any desired point along the shank of the nut.

Bearing on the groove within the retain ing ring 12 are a plurality of gripping arms 21. These arms are each formed, as best shown in Figs. 6 and 7, with an arcuate projection 22 on its outer surface intermediate its ends and a notch or groove 23 in its inner V 7 surface in substantially transverse alignment with the center of the arcuate surface. The outer endof the arm is oifsetgto form a lug or projection 24 adapted to be engaged by the fru'stro-conical part of sleeve 14, or by theeurvedsurface ofthefiange 6 of the nut. The inner end of the. arm, isprovided with a thin hook-like jaw 25' adapted to -reach be tween or under the bearing balls amtto engage the concave surface of the inner race of the bearing. n; i 1 i V 'The arms are positioned within the reminingrliing: andra split spring ring 261 is sprung-unto the, grooves. The tension of i this ring holds the arms against" the retainand the jaws 2fiiofi'the gripping arms engaging the inner surface of the inner race 5 of the ball bearing. When the parts are in this position, the operator rotates the cap 157i andso; retracts sleeve 14 until the {rust-roconical surfacelthereof engages the lugs 24 ahthe: ends ofthe gripping arms'and wedges theselugs, outwardly, causing the jawsito take a firm .gripupon the ball: race. The

operator now rotates screw 1, bymeans of g a wrench engagingthe head thereofi, tomove washer 3 away from; the nut. xThis operation causesaflange 6 carried by the nut to the arms to grip. the ball race morefirmly engage the projectionsfleof the gripping amms ami this: pressure tends both to. cause and to pull: the race toward 'the right, as shown inthe-drawing, slidingit ofi the support lasiillustratcrhinFig. 1'; i

It. will'readil 1 be seen that the tool prohides. a convenientlylcoperated means for firmly gripping and withdrawing. the ball race; 5), although only: theouter face thereof ba exposed, and which, is. prevented from slipping ofl the'race due" to pressure of flange I 6 upon the arms which pressure tends to pull the race from its support, and at the same time causes the ripping arms tograsp the race more tight increased.

y i the! pressure is WVhile'I have described the illustrated em bodirnentof my invention in some particu larity, this embodimentis shown by Way of illustration only and not by way of limit-as tion, and I do not therefore confine" myself to the precise, details shown and described, butclaim as my invention all embodiments thereof: coming: within the scope, of; the appended claims. I Iclaim; it I. J y a LA, tool comprising ai chuck having a plurality of gripping jaws, cam-means for causing the jawspto exertgripping, pressure oaan object, a: longitudinally m WtblGZPT ET sure exerting element engageable with the support-of the, objects. and a secondj an means carried by saidfelement caus ngffihfl jaws. to, exert additional; gripping i pressu on: the object when said:element:.emrtscpres: sure between the object;audits-support v 2. A tool comprising a plurality of: gripping-arms, a; retainer preventinginadial; displacement of an, intermediate part, oi each arm, a gripping jLZLW at one enfl'ofz eaclmarm, I cam means. engaging the other end of each arm, andx a; longitudinal-pressure-exerting element carrying: the cam-means and; open able to GXGIiSLPlfBSSUBB: between. an object.- and 7 its support and to simultaneously cause the cam meanszto contract the-jaws; a i

A tool comprisinga chuck having a plurality of gripping jawg a vring surround ing the, arms and: with. whiich; they" arein pivotal contact, a spring retaining-the arms in contact-i with said ring, screw for? exerting longitudinal pressumeupon the endief a shaft from whichiituisdesireel toinemove articles, a nutithreaxledsonlsaidi screw, and a tapered surface onisaid mut havingdtsdargest 7 diameter toward the. endi ofrsaitl screw which bears. upon theshaft engagihg the outer end ofsaidiarms;

In testimony whereof I hereunto; affix 18, 192111: e v V JAMES IHQWELL,

signature April 

